Blurring/hiding text in Acrobat

Acrobat 9.0.0

I'm a new user. I would like to know if Acrobat has a feature where I can blur parts of the text so that my reader will not see them. Ideally, this would just be a selection tool type of an action.

If not, does anyone have any tips from hiding parts of a document from a reader? I want the reader to see that there is some text there, but that it is not available for them to read.

Thanks!

Avery